// ignore_for_file: unused_element

import 'dart:async';

import 'package:enjoy_plus_three/utils/http.dart';
import 'package:enjoy_plus_three/utils/toast.dart';
import 'package:flutter/material.dart';

import '../../utils/token.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({super.key});

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
    // 1. 实现倒计时
  int _countdown = 60;
  bool _isCountingDown = false;
  Timer? _timer;
  void _startCountdown() {
    if (_isCountingDown) {
      return;
    }
    _isCountingDown = true;
    _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
      setState(() {
        if (_countdown > 0) {
          _countdown--;
        } else {
          _isCountingDown = false;
          _countdown = 60;
          timer.cancel();
        }
      });
    });
  }

  @override
  void deactivate() {
    super.deactivate();
    _timer?.cancel();
  }
  
  final TextEditingController _phoneController = TextEditingController();
  final TextEditingController _codeController = TextEditingController();
  // 获取验证码
  void _getCode ()async {

    String mobile = _phoneController.text;
    if(mobile.isEmpty){
      return ToastUtil.showError('请输入手机号');
    }
    RegExp regExp = RegExp(r'^1[3-9]\d{9}$');
    if(!regExp.hasMatch(mobile)){
      return ToastUtil.showError('请输入正确的手机号');
    }
    // 倒计时
    _startCountdown();
    // 发送请求
    var res = await http.get('/code',params: {'mobile': mobile});
    if(res['code'] ! == 10000) return ToastUtil.showError('获取验证码失败');
    // 模拟验证码
    Future.delayed(const Duration(seconds: 3), () {
      setState(() {
        _codeController.text = res['data']['code'];
      });
    });
  }

// 3. 提交登录信息
  void _submit() async {
    // 3.1 校验手机号
    if (_phoneController.text.isEmpty) {
      return ToastUtil.showError('请输入手机号码');
    }
    if (! RegExp(r'^1[3-9]\d{9}$').hasMatch(_phoneController.text)) {
      return ToastUtil.showError('请输入正确的手机号码');
    }

    // 3.2 校验验证码
    if (_codeController.text.isEmpty) {
      return ToastUtil.showError('请输入验证码');
    }
    if (! RegExp(r'^\d{6}$').hasMatch(_codeController.text)) {
      return ToastUtil.showError('请输入6位验证码');
    }
    
    // 3.3 调用登录接口
    final res = await http.post('/login', 
    data: {
      'mobile': _phoneController.text,
      'code': _codeController.text,
    });
    if (res['code'] != 10000) return ToastUtil.showError('登录失败');
    
    // 3.4 存储token
    TokenManager().saveToken(res['data']['token']);
    ToastUtil.showSuccess('登录成功');
    
    // 3.5 返回到上一页
    _timer!.cancel(); // 注意清除定时器
    // ignore: use_build_context_synchronously
    Navigator.pop(context);
  }
  
  @override
  void dispose() {
    super.dispose();
    _phoneController.dispose();
    _codeController.dispose();
    super.dispose();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        title: const Text('登录'),
        backgroundColor: Colors.transparent,
        centerTitle: true,
      ),
      body: Container(
        padding: const EdgeInsets.all(20),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: [
             Row(
              children: const [
                Text(
                  '登录',
                  style: TextStyle(
                    fontSize: 25,
                    fontWeight: FontWeight.bold,
                  ),
                )
              ],
            ),
            const SizedBox(height: 10),
             Row(
              children: const [
                Text(
                  '加入享+, 让生活更轻松',
                  style: TextStyle(fontSize: 15),
                )
              ],
            ),
            const SizedBox(height: 30),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                  Expanded(
                    child: TextField(
                      controller: _phoneController,
                      keyboardType: TextInputType.phone,
                      maxLength: 11,
                      decoration: const InputDecoration(
                        labelText: '手机号',
                        hintText: '请输入手机号',
                      ),
                  ),
                ),
                ElevatedButton(
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.white,
                    shadowColor: Colors.transparent,
                    foregroundColor: const Color.fromARGB(255, 85, 145, 175),
                    minimumSize: const Size(100, 50),
                  ),
                  onPressed: () {
                     _getCode();
                  },
                  child: _isCountingDown
                    ? Text('$_countdown s后重新获取',
                        style: const TextStyle(color: Colors.grey))
                    : const Text('获取验证码'),
                ),
              ],
            ),
              TextField(
                controller: _codeController,
                keyboardType: TextInputType.number,
                maxLength: 6,
                decoration: const InputDecoration(
                  labelText: '验证码',
                  hintText: '请输入6位验证码',
                ),
            ),
            const SizedBox(height: 8),
            Row(
              children: const [
                Text(
                  '未注册手机号经验证后将自动登录',
                  style: TextStyle(fontSize: 12, color: Colors.grey),
                ),
              ],
            ),
            const SizedBox(height: 50),
            Row(
              children: [
                Expanded(
                  child: ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      backgroundColor: const Color.fromARGB(255, 85, 145, 175),
                      minimumSize: const Size(100, 50),
                    ),
                    onPressed: () {
                     _submit();
                    },
                    child: const Text(
                      '登录',
                      style: TextStyle(
                        color: Colors.white,
                        fontSize: 20,
                      ),
                    ),
                  ),
                )
              ],
            )
          ],
        ),
      ),
    );
  }
}
